Pidgin Portable is a multi-protocol instant messaging client that works with AOL Instant Messenger, ICQ, MSN Messenger, Yahoo! and more. You can log into multiple networks all with the same program. All your IM settings and buddy lists are self-contained, so it leaves no personal information behind on the machine you run it on.

Pidgin Portable supports the two most popular encryption plugins for Pidgin. Both are packaged as portable installers that automatically work with Pidgin Portable. You can install Pidgin-Encryption 3.1 Rev 2 (learn more) and/or Pidgin-OTR 3.2.1 (learn more) and communicate securely with other users.

Download Pidgin Portable: http://portableapps.com/apps/internet/pidgin_portable